Helium pumping by argon frosting on a 4. 5 K surface
Pumping of helium gas by means of argon frosting on a bare copper surface cooled to {approximately}4.5 K has been investigated in one of the neutral beamlines of the DIII-D tokamak. The beamline is designed to handle high power hydrogen and deuterium beams and corresponding high gas feed rates. By prefrosting the cryo panels with argon in an actual beamline, multi-second helium gas pulses have been handled at a background gas pressure low enough for formation and transport of helium beams. Appreciable pumping of helium gas was observed even at an argon-to-helium ratio as low as 20. 16 refs., 5 figs.
- Research Organization:
- General Atomics, San Diego, CA (USA)
- Sponsoring Organization:
- DOE/ER
- DOE Contract Number:
- AC03-89ER51114
- OSTI ID:
- 5281827
- Report Number(s):
- GA-A-19792; CONF-891093--19; ON: DE90004106
- Country of Publication:
- United States
- Language:
- English
Similar Records
Helium pumping by argon frosting on a 4. 5 K surface
Five second helium neutral beam injection using argon-frost cryopumping techniques
Five second helium neutral beam injection using argon-frost cryopumping techniques
Journal Article
·
Tue May 01 00:00:00 EDT 1990
· Journal of Vacuum Science and Technology, A (Vacuum, Surfaces and Films); (USA)
·
OSTI ID:6764819
Five second helium neutral beam injection using argon-frost cryopumping techniques
Conference
·
Sat Dec 30 23:00:00 EST 1995
·
OSTI ID:464910
Five second helium neutral beam injection using argon-frost cryopumping techniques
Conference
·
Sun Oct 01 00:00:00 EDT 1995
·
OSTI ID:459431
Related Subjects
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700201* -- Fusion Power Plant Technology-- Blanket Engineering
BEAM INJECTION HEATING
DEGASSING
DOUBLET REACTORS
ELEMENTS
FIRST WALL
FLUIDS
GASES
HEATING
HELIUM
NONMETALS
PLASMA HEATING
PRESSURE MEASUREMENT
PUMPING
RARE GASES
SURFACES
THERMONUCLEAR REACTOR WALLS
THERMONUCLEAR REACTORS
TOKAMAK TYPE REACTORS
WAVE FORMS
700201* -- Fusion Power Plant Technology-- Blanket Engineering
BEAM INJECTION HEATING
DEGASSING
DOUBLET REACTORS
ELEMENTS
FIRST WALL
FLUIDS
GASES
HEATING
HELIUM
NONMETALS
PLASMA HEATING
PRESSURE MEASUREMENT
PUMPING
RARE GASES
SURFACES
THERMONUCLEAR REACTOR WALLS
THERMONUCLEAR REACTORS
TOKAMAK TYPE REACTORS
WAVE FORMS